Patents by Inventor Takatoshi Tanaka

Takatoshi Tanaka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240034073
    Abstract: An image forming apparatus includes a photosensitive member and a scanning unit including a light source, a rotatable polygonal mirror, and a sensor. The image forming apparatus includes setting of an operation in a first mode and setting of an operation in a second mode. The image forming apparatus further comprises, a surface identifying portion and a correction data storing portion configured to prestore correction data including first correction data for a first rotational speed and second correction data for a second rotational speed. Positional deviation in a main scan direction of laser light is corrected on the basis of the first correction data or the second correction data.
    Type: Application
    Filed: October 12, 2023
    Publication date: February 1, 2024
    Inventors: Yoshihiko Tanaka, Mitsuhiro Ohta, Takatoshi Tanaka, Fumihiko Yamaya, Naoki Matsushita, Hiroki Katayama
  • Publication number: 20240001702
    Abstract: A method for manufacturing a recorded matter having a stereoscopic image includes a first heating step, a foaming control liquid application step, and a second heating step. A surface temperature T0 (° C.) of the record medium before being heated in the first heating step, a surface temperature T1 (° C.) of the record medium after being heated in the first heating step, and a foaming start temperature Tf (° C.) of the foaming material satisfy a relationship represented by Formula (1): T0<T<Tf??(1).
    Type: Application
    Filed: June 29, 2023
    Publication date: January 4, 2024
    Inventors: TOSHIHIRO OMAGARI, OLIVIA HERLAMBANG, TAKATOSHI TANAKA, YOSHIYUKI NAGASE, TETSURO NOGUCHI
  • Publication number: 20240002622
    Abstract: A manufacturing method for manufacturing a recorded product having a three-dimensional image, the manufacturing method including applying a foaming promotion liquid to a recording medium having a base material and a foaming layer provided on the base material and containing a foaming particle having a shell layer including polyacrylonitrile copolymer, and heating the recording medium to which the foaming promotion liquid is applied. The foaming promotion liquid includes a good solvent for the polyacrylonitrile copolymer and a poor solvent for the polyacrylonitrile copolymer.
    Type: Application
    Filed: May 12, 2023
    Publication date: January 4, 2024
    Inventors: OLIVIA HERLAMBANG, TAKATOSHI TANAKA, TOSHIHIRO OMAGARI, TETSURO NOGUCHI, YOSHIYUKI NAGASE
  • Patent number: 11852988
    Abstract: An image forming apparatus to form an image on a recording material includes a photosensitive member, an exposure device to form a latent image on the photosensitive member, a tubular body defining a space in which at least a part of the exposure device is contained, and a support portion that supports the exposure device and is provided along a rotation axis direction of the photosensitive member in the space of the tubular body. The image forming apparatus further includes, in the rotation axis direction, a first side plate fixed to one end portion of the tubular body, and a second side plate fixed to another end portion of the tubular body. One support portion end portion in the rotation axis direction is fixed to the first side plate, and another support portion end portion in the rotation axis direction is fixed to the second side plate.
    Type: Grant
    Filed: May 5, 2022
    Date of Patent: December 26, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shoji Yamamoto, Akira Yoshimura, Shogo Nagamine, Naoki Matsushita, Yoshihiko Tanaka, Hisanori Kobayashi, Takatoshi Tanaka, Mitsuhiro Ohta, Hiroki Katayama, Akitoshi Toyota
  • Patent number: 11835880
    Abstract: A rotatable polygon mirror including a plurality of reflecting surfaces includes first and second surfaces connecting to the reflecting surfaces provided on opposite ends, first and second protrusion portions with an annular shape, provided on the first and second surfaces and protruding inversely to each other in the rotational axis direction, about a rotational axis of the rotatable polygon mirror. A height of a top surface portion of the first protrusion portion from the first surface is higher than that of a top surface portion of the second protrusion portion from the second surface with respect to the rotational axis direction. In a case that the rotatable polygon mirrors are stacked in the rotational axis direction, a wall of an inner peripheral side of the first protrusion portion and a wall of an outer peripheral side of the second protrusion portion are engaged with each other.
    Type: Grant
    Filed: May 20, 2022
    Date of Patent: December 5, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hisanori Kobayashi, Takatoshi Tanaka
  • Patent number: 11820158
    Abstract: An image forming apparatus includes a photosensitive member and a scanning unit including a light source, a rotatable polygonal mirror, and a sensor. The image forming apparatus includes setting of an operation in a first mode and setting of an operation in a second mode. The image forming apparatus further comprises, a surface identifying portion and a correction data storing portion configured to prestore correction data including first correction data for a first rotational speed and second correction data for a second rotational speed. Positional deviation in a main scan direction of laser light is corrected on the basis of the first correction data or the second correction data.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: November 21, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshihiko Tanaka, Mitsuhiro Ohta, Takatoshi Tanaka, Fumihiko Yamaya, Naoki Matsushita, Hiroki Katayama
  • Publication number: 20230294129
    Abstract: A recording medium for producing a recorded matter having a three-dimensional image comprises: a substrate; and a foaming layer being provided on the substrate and containing a foaming material which foams with heat and a binder resin. A contact angle of water to a surface of the foaming layer 30 seconds after the water is brought into contact with the surface of the foaming layer is 30° or more and 80° or less, and a ratio of a diameter of a water droplet 30 seconds after the water is brought into contact with the surface of the foaming layer to a diameter of the water droplet 0.01 seconds after the water is brought into contact with the surface of the foaming layer is 1.3 times or less.
    Type: Application
    Filed: March 13, 2023
    Publication date: September 21, 2023
    Inventors: OLIVIA HERLAMBANG, TOSHIHIRO OMAGARI, YOSHIYUKI NAGASE, TETSUFUMI SHIBA, TAKATOSHI TANAKA, ARIKA TANAKA
  • Patent number: 11714372
    Abstract: In an image forming apparatus, a lifetime detection unit acquires an activation time threshold using a threshold stored in an activation time storage unit and an environmental temperature detected by a temperature detection unit, and, in a case where activation time acquired by an activation time acquisition unit is shorter than the activation time threshold, makes a notification of at least one of a lifetime or replacement of a deflection unit or an optical scanning unit.
    Type: Grant
    Filed: February 17, 2022
    Date of Patent: August 1, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takatoshi Tanaka, Yoshihiko Tanaka, Naoki Matsushita
  • Patent number: 11703776
    Abstract: A light deflector includes a rotary polygon mirror and a motor to rotate the rotary polygon mirror. The rotary polygon mirror includes reflecting surfaces to reflect light emitted from a light source and a hole portion provided in a rotational axis direction. The motor includes a shaft portion in the hole portion and a support member supporting the rotary polygon mirror. The support member is fixed to, and coaxial with, the shaft portion, and includes an insertion portion in the hole portion. The rotary polygon mirror includes a protruded portion near the hole portion and protruding from at least one reflecting surface orthogonal to the rotational axis direction. The protruded portion includes a fitting portion fitted to the shaft portion or the support member and in which a portion continued from a hole portion surface is protruded toward the rotation center more than the surface forming the hole portion.
    Type: Grant
    Filed: November 2, 2021
    Date of Patent: July 18, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takatoshi Tanaka, Yoshihiko Tanaka, Naoki Matsushita
  • Publication number: 20230173836
    Abstract: A method of producing a recorded matter including a stereoscopic image includes applying, onto a recording medium including a foamable layer, a first liquid composition containing a foam promoting or preventing component, and applying, onto the recording medium, a second liquid composition that does not contain the foam promoting or preventing component and the coloring material. A region to which the ink has been applied includes a first region and a second region in which amounts of ink applied are different, and a total of volatile solvents contained in the first liquid composition, the ink and the second liquid composition, which have been applied to the first region, is 95% by mass or more to 105% by mass or less with respect to a total of volatile solvents contained in the first liquid composition, the ink and the second liquid composition, which have been applied to the second region.
    Type: Application
    Filed: December 5, 2022
    Publication date: June 8, 2023
    Inventors: TAKATOSHI TANAKA, OLIVIA HERLAMBANG, YOSHIYUKI NAGASE, TETSUFUMI SHIBA
  • Patent number: 11597227
    Abstract: The recording medium includes: an absorbent substrate; and an ink receiving layer provided on the absorbent substrate. The dry coating amount of the ink receiving layer is 6.0 g/m2 or more to 11.0 g/m2 or less, arithmetic average roughness Ra1 (?m) of a surface of the absorbent substrate satisfies a relationship of Expression (1) below, arithmetic average roughness Ra1 and arithmetic average roughness Ra2 (?m) of a surface of the ink receiving layer satisfy a relationship of Expression (2) below, and an average length RSm1 (mm) of a roughness curve element of the surface of the absorbent substrate and an average length RSm2 (mm) of a roughness curve element of the surface of the ink receiving layer satisfy a relationship of Expression (3) below. Ra1?5.0 ?m??(1) Ra2/Ra1?0.87??(2) RSm2/RSm1?1.
    Type: Grant
    Filed: June 21, 2021
    Date of Patent: March 7, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takatoshi Tanaka
  • Publication number: 20220373925
    Abstract: A rotatable polygon mirror including a plurality of reflecting surfaces includes first and second surfaces connecting to the reflecting surfaces provided on opposite ends, first and second protrusion portions with an annular shape, provided on the first and second surfaces and protruding inversely to each other in the rotational axis direction, about a rotational axis of the rotatable polygon mirror. A height of a top surface portion of the first protrusion portion from the first surface is higher than that of a top surface portion of the second protrusion portion from the second surface with respect to the rotational axis direction. In a case that the rotatable polygon mirrors are stacked in the rotational axis direction, a wall of an inner peripheral side of the first protrusion portion and a wall of an outer peripheral side of the second protrusion portion are engaged with each other.
    Type: Application
    Filed: May 20, 2022
    Publication date: November 24, 2022
    Inventors: Hisanori Kobayashi, Takatoshi Tanaka
  • Publication number: 20220276599
    Abstract: In an image forming apparatus, a lifetime detection unit acquires an activation time threshold using a threshold stored in an activation time storage unit and an environmental temperature detected by a temperature detection unit, and, in a case where activation time acquired by an activation time acquisition unit is shorter than the activation time threshold, makes a notification of at least one of a lifetime or replacement of a deflection unit or an optical scanning unit.
    Type: Application
    Filed: February 17, 2022
    Publication date: September 1, 2022
    Inventors: Takatoshi Tanaka, Yoshihiko Tanaka, Naoki Matsushita
  • Publication number: 20220260938
    Abstract: An image forming apparatus to form an image on a recording material includes a photosensitive member, an exposure device to form a latent image on the photosensitive member, a tubular body defining a space in which at least a part of the exposure device is contained, and a support portion that supports the exposure device and is provided along a rotation axis direction of the photosensitive member in the space of the tubular body. The image forming apparatus further includes, in the rotation axis direction, a first side plate fixed to one end portion of the tubular body, and a second side plate fixed to another end portion of the tubular body. One support portion end portion in the rotation axis direction is fixed to the first side plate, and another support portion end portion in the rotation axis direction is fixed to the second side plate.
    Type: Application
    Filed: May 5, 2022
    Publication date: August 18, 2022
    Inventors: Shoji Yamamoto, Akira Yoshimura, Shogo Nagamine, Naoki Matsushita, Yoshihiko Tanaka, Hisanori Kobayashi, Takatoshi Tanaka, Mitsuhiro Ohta, Hiroki Katayama, Akitoshi Toyota
  • Patent number: 11385457
    Abstract: In an optical scanning device, an outer wall closest to a circumscribed circle of a rotating polygon mirror has a space in a position facing to a position of a reflection surface of the rotating polygon mirror in an axial direction of a rotating shaft. A part of a cover is provided in a position farther from the circumscribed circle than the outer wall so as to close the space, when the optical scanning device is viewed in a direction perpendicular to the axial direction of the rotating shaft.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: July 12, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yoshihiko Tanaka, Hisanori Kobayashi, Naoki Matsushita, Takatoshi Tanaka, Mitsuhiro Ohta, Hiroki Katayama
  • Patent number: 11383413
    Abstract: A manufacturing method of a polygonal mirror using a metal mold including a first mold, a second mold, a third mold, and a fourth mold includes a step of forming the molded member by providing the third mold and the fourth mold between the first mold and the second mold in a state in which the third mold and the fourth mold are in contact with each other and then by injecting a resin material into the metal mold, and a step of separating the third mold from the first crossing surface of the molded member in a direction crossing the first crossing surface.
    Type: Grant
    Filed: April 15, 2019
    Date of Patent: July 12, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Fumihiko Yamaya, Hiroki Katayama, Yoshihiko Tanaka, Takatoshi Tanaka, Mitsuhiro Ohta, Atsushi Takata, Naoki Matsushita
  • Patent number: 11366310
    Abstract: A polygonal mirror includes reflecting surfaces, a molded member including a first surface and a second surface, a contact portion, and gate marks. Each of said first surface and said second surface has a polygonal shape. The contact portion and the gate marks are formed at non-overlapping positions with a line segment connecting a vertex of the polygonal shape with a rotation center. The gate marks and the reflecting surfaces are the same in number. A perpendicular bisector of a line segment connecting centers of the gate marks adjacent to each other with respect to a rotational direction of the polygonal mirror is formed at a position passing through an associated vertex of the polygonal shape and the rotation center.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: June 21, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Naoki Matsushita, Atsushi Takata, Yoshihiko Tanaka, Takatoshi Tanaka, Fumihiko Yamaya, Mitsuhiro Ohta, Hiroki Katayama
  • Patent number: 11353805
    Abstract: An image forming apparatus to form an image on a recording material includes a photosensitive member, an exposure device to form a latent image on the photosensitive member, a tubular body defining a space in which at least a part of the exposure device is contained, and a support portion that supports the exposure device and is provided along a rotation axis direction of the photosensitive member in the space of the tubular body. The image forming apparatus further includes, in the rotation axis direction, a first side plate fixed to one end portion of the tubular body, and a second side plate fixed to another end portion of the tubular body. One support portion end portion in the rotation axis direction is fixed to the first side plate, and another support portion end portion in the rotation axis direction is fixed to the second side plate.
    Type: Grant
    Filed: May 3, 2021
    Date of Patent: June 7, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shoji Yamamoto, Akira Yoshimura, Shogo Nagamine, Naoki Matsushita, Yoshihiko Tanaka, Hisanori Kobayashi, Takatoshi Tanaka, Mitsuhiro Ohta, Hiroki Katayama, Akitoshi Toyota
  • Patent number: 11330137
    Abstract: An image forming apparatus including a first output unit configured to detect a light beam deflected by a rotary polygon mirror rotated by a drive unit to output a first signal, a second output unit configured to output a second signal to be used as a reference, and a first controller configured to perform the phase control based on the first signal and the second signal. The phase control is performed in accordance with a condition set based on a rotation speed of the drive unit corresponding to an image forming speed by outputting a drive signal having a predetermined pulse width to the drive unit to accelerate or decelerate the drive unit so that the first signal and a position signal, based on the second signal, substantially match. The condition being a pulse width of the drive signal and/or a frequency of performing the phase control.
    Type: Grant
    Filed: May 20, 2020
    Date of Patent: May 10, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takatoshi Tanaka, Rikuo Kawakami
  • Publication number: 20220137528
    Abstract: A light deflector includes a rotary polygon mirror and a motor to rotate the rotary polygon mirror. The rotary polygon mirror includes reflecting surfaces to reflect light emitted from a light source and a hole portion provided in a rotational axis direction. The motor includes a shaft portion in the hole portion and a support member supporting the rotary polygon mirror. The support member is fixed to, and coaxial with, the shaft portion, and includes an insertion portion in the hole portion. The rotary polygon mirror includes a protruded portion near the hole portion and protruding from at least one reflecting surface orthogonal to the rotational axis direction. The protruded portion includes a fitting portion fitted to the shaft portion or the support member and in which a portion continued from a hole portion surface is protruded toward the rotation center more than the surface forming the hole portion.
    Type: Application
    Filed: November 2, 2021
    Publication date: May 5, 2022
    Inventors: Takatoshi Tanaka, Yoshihiko Tanaka, Naoki Matsushita